常用的类

通用

• Apache Commons
  http://commons.apache.org

  Apache Commons is an Apache project focused on all aspects of reusable Java components.

• Guava: Google Core Libraries for Java
  https://github.com/google/guava

输入输出

• Commons IO
  http://commons.apache.org/proper/commons-io/

数据格式

• fastjson
  https://github.com/alibaba/fastjson

• Jackson
  https://github.com/FasterXML/jackson

• google-gson
  https://github.com/google/gson

压缩与解压缩

• snappy-java http://xerial.org/snappy-java/
  https://github.com/xerial/snappy-java

网络

• Apache HttpComponents
  https://hc.apache.org
  https://hc.apache.org/httpcomponents-client-ga/quickstart.html

• Netty
  http://netty.io

日志

• SLF4J, Simple Logging Facade for Java
  http://www.slf4j.org

开发辅助

• JUnit
  http://junit.org/junit4/

• Apache Thrift
  https://thrift.apache.org

• Hamcrest
  http://hamcrest.org

  Matchers that can be combined to create flexible expressions of intent

  柔性测试工具。

SEE

• Java Examples
  http://www.java-examples.com

• MVNrepository http://mvnrepository.com